I have 2 of the Cambridge units so I am quite fond of them. I am a little unclear. Are you using the same DAC for the Squeezebox as for the CA? And what digital connection between the two?
I had the Squeezebox when it first was released and loved it. I gave it to one of my kids when I bought a Bluesound Node about a decade ago, before I bought the CA units, so I never did a direct comparison, but sonically the Squeezebox was no slouch